Home Products Crusher Blade

Crusher Blades

When you invest in a crusher cutting set, wear life and reliability matter. YISHI manufactures industrial crusher blades for recycling and size reduction—delivering stable performance and lower total cost.

Crusher Blades We Manufacture

YISHI crusher blades are precision-ground cutting tools engineered for size-reduction machinery in recycling, plastics, and waste processing lines. These blades are specified by procurement engineers and maintenance teams who require exact material grades—typically D2 (Cr12MoV), SKD11, M2 high-speed steel, or tungsten carbide—to match abrasive feedstocks and high-throughput cycles. Each blade is vacuum heat-treated to a controlled hardness range of HRC 58–65, then surface-finished to Ra 0.8 µm or finer on cutting edges. The product range covers granulator rotors, stator knives, single-shaft shredder blades, and rasper blades, with mounting patterns machined to OEM slot dimensions or custom drawings. The primary technical hook is repeatable edge life under impact and sliding wear, achieved through metallurgical control and multi-axis CNC grinding that holds dimensional tolerances within ±0.02 mm on critical profiles.

Vacuum Heat-Treated Tool Steels
Blades are produced from D2, SKD11, Cr12MoV, M2, or H13, hardened to HRC 58–62 for standard applications and HRC 62–65 for high-wear granulator rotors. Vacuum quenching ensures uniform microstructure and minimal distortion.
Multi-Axis CNC Ground Edges
Cutting edges are finished on 5-axis CNC grinders, holding a profile tolerance of ±0.02 mm. Edge radii can be specified down to 0.01 mm for film and fibre granulation.
Machine-Compatible Mounting Geometry
Bolt-hole patterns, counterbores, and keyways are machined to match OEM rotor seats for common brands including Zerma, Vecoplan, Weima, and Cumberland. Custom PCD and bolt-circle diameters are accepted from drawings.
Reversible Multi-Edge Design
Most granulator and shredder blades are supplied with two or four usable cutting edges. Rotor blades can be indexed 180° or 90° to extend service intervals before re-sharpening.
Controlled Surface Finish
Cutting faces are ground to Ra 0.4–0.8 µm to reduce material adhesion during processing of films, fibres, and sticky regrind. Non-cutting surfaces receive a stress-relieved finish.
Tungsten Carbide Inlays for Extreme Abrasion
For glass-filled polymers, metal-contaminated scrap, or mineral-heavy feedstocks, blades can be supplied with K10/K20 tungsten carbide inlays brazed onto a tough steel body.

Take a Closer Look

Plastics Recycling
Single-Shaft Shredding
Tyre and Rubber Crumbing
Metal Swarf and Scrap Processing
Wood and Biomass Grinding

Plastics Recycling
Granulator rotor and stator blades for size-reducing HDPE, LDPE, PP, PET bottles, and purge lumps. D2 blades at HRC 58–60 are standard; carbide-tipped edges are specified for glass-filled nylon.
Single-Shaft Shredding
Square or rectangular shredder knives for Vecoplan, Weima, and Lindner-type machines processing wood waste, MSW, and bulky rigid plastics. Typically supplied in Cr12MoV at HRC 58–62.
Tyre and Rubber Crumbing
Rasper and granulator blades for ambient and cryogenic tyre recycling lines. M2 high-speed steel at HRC 62–65 resists the high-impact, high-abrasion conditions of steel-belted tyre shredding.
Metal Swarf and Scrap Processing
Crusher blades for turnings and swarf reduction. H13 or high-toughness tool steels are selected to withstand impact without chipping, with hardness typically held at HRC 54–58.
Wood and Biomass Grinding
Blades for hammer-mill and chipper conversions, as well as dedicated wood granulators. D2 and SKD11 grades provide a balance of edge retention and re-sharpenability in high-silica wood species.

Technical Specifications

Dimensions	OD 150–800 mm, ID 30–200 mm, thickness 8–60 mm for rotor blades; stator blades up to 1200 mm length, 60–150 mm width, 10–40 mm thickness. Custom dimensions accepted.
Materials	D2, Cr12MoV, SKD11, M2, H13, 9CrSi, tungsten carbide (K10/K20), HSS, HSS-E
Hardness	HRC 54–65, depending on material grade and application
Tolerances	Thickness ±0.02 mm, bore diameter H7, bolt-hole position ±0.05 mm, profile ±0.02 mm
Surface Finish	Cutting edges Ra 0.4–0.8 µm; mounting faces Ra 1.6 µm
Customisation	Buyers can specify OEM part numbers, submit CAD drawings or DXF files, define bolt-hole patterns, counterbore dimensions, edge angles, and coating requirements (TiN, TiCN, CrN).

Why Choose Yishi

YISHI operates an in-house vacuum heat-treatment line and a climate-controlled CNC grinding shop, which gives us direct control over the two variables that determine blade life: metallurgical hardness and edge geometry. We do not outsource heat treatment. Every batch is hardness-tested and recorded against the order number. Our engineering team reviews your feedstock data—material type, contamination level, throughput rate—and recommends a specific steel grade and hardness window rather than a generic 'wear-resistant' option. We ship with dimensional inspection reports and offer re-sharpening services that maintain the original edge profile. For OEM-replacement blades, we match mounting patterns to your existing rotor drawings, eliminating fit-up delays during changeovers.

Get a Quote

Frequently Asked Questions

What steel grade should I select for shredding glass-filled nylon?

Glass-filled and mineral-filled polymers are highly abrasive. We recommend tungsten carbide inlays (K10 or K20) brazed onto a D2 or Cr12MoV body. If carbide is not in the budget, an M2 or HSS-E blade at HRC 62–65 will provide longer edge life than standard D2, but will still wear faster than carbide. Provide the filler percentage and we can advise on the expected blade life difference.
Can you match the mounting pattern of my existing granulator rotor?

Yes. Send us your existing blade drawing, a DXF file, or the OEM part number. We will reverse-engineer the bolt-hole positions, counterbore depths, and slot dimensions to match your rotor. We can also supply a pre-production sample for fit-check before full batch manufacturing.
What is the typical lead time for a custom crusher blade order?

Standard D2 and SKD11 blades without special coatings ship in 15–25 working days from drawing approval. Blades requiring tungsten carbide inlays or PVD coatings (TiN, CrN) typically require 25–35 working days. Rush orders can be accommodated depending on current shop loading.
Do you offer re-sharpening services?

Yes. We re-sharpen crusher blades to the original edge geometry using the same CNC grinding programs. This maintains the correct cutting angle and clearance, which is critical for granulator performance. We can also hardness-test returned blades to check for heat damage before grinding.
What hardness should I specify for a tyre rasper blade?

Tyre raspers operate under high impact and heavy abrasion from steel belt fragments. We typically supply M2 high-speed steel at HRC 62–65 for this application. If chipping is a concern, we can temper back to HRC 58–60 to increase toughness, but this will reduce wear life. The trade-off should be evaluated based on your specific feedstock contamination levels.
How do I measure wear on a crusher blade to decide when to replace or re-sharpen it?

The most reliable indicator is an increase in motor amp draw or a drop in throughput at the same feed rate. Visually, measure the edge radius with a radius gauge—when it exceeds 0.2–0.3 mm on a granulator blade, cutting efficiency drops significantly. We can supply a wear-limit drawing with each blade batch to help your maintenance team make consistent decisions.